Just came back from Le Morne, I was there at the end of September and ridden TT. Never been in Brazil so can't compare but first thing first, in high tide in lagoon where beginners learn it can be choppy but wouldn't call it killer chop. All depends on the tide. With low tide water gets very flat.
With regards to "plenty beginners" thats not problem at all as lagoon is huge and its easy to edge upwind from all the crowd which always seems to gather close to beach and you can avoid crowd unless you crave beach goers attention.
You can see from vid above how huge lagoon is and it usually direct on shore wind. On 14 days trip we have 11 days of +20kts wind. I was riding 10m for most part and tried my Soul 15m at the beginning (around 10am) when wind was picking up but was hugely overpower very quickly as by noon wind was full on. Only one day was for larger kite >12m
From what I was told only Le Morne gets thermal wind hence it's more windy than any other spot although it seems like north east part should be most windy.
I chose this place due to our young daughter 15months old at the time and we both wanted to visit that Island but I think unless you want to ride waves it's only worth it to go there once. Very few intermediate riders in lagoon on TT.
We stayed at riu creole which is located just where you kite and we had like 20m from our room to lunching/landing spot.
Something to bear in mind we met couples with young children (1-3 years old) and it was very tricky for both people to get enough ridding in day as wind was blowing reliably from 11am to 4pm and for to people switching it isn't much time. Unless your second half doesn't ride or you can already leave your children at hotel kindergarten (>4years) you may bot get enough ridding.
Done my first backrolls while there hence always this place will be magical to me
only regret that didn't try them earlier